vc.tabBarItem.image=UIImage(named:"新闻")
two.tabBarItem.image=UIImage(named:"社区")
three.tabBarItem.image=UIImage(named:"投研")
four.tabBarItem.image=UIImage(named:"我的")
vc.tabBarItem.title = "新闻"
two.tabBarItem.title="新闻"
three.tabBarItem.title="新闻"
four.tabBarItem.title="新闻"
lettabar =UITabBarController()
tabar.viewControllers= [navVC,navTwo,navThree,navFour]
self.window?.rootViewController= tabar
return true
